Hello Keith,
sorry for reacting on your Ki-Gas mail a bit late, but was
climbing some passes in the Swiss Alps with the N-type.
As you say, the KI-Gas system is for easier cold-starting
a petrol engine, and really necessary unless the tuning of
the carburettor is set very much on the rich side.
Whilst the starter is running, you simultaneously pull and push
the handle of the Ki-Gas pump once or twice, and through
two jets, which are fitted on the inlet-manifold, a fine vaporised
spray of petrol fills the inlet system and enters the combustion
chambers. The fine spray results from a spiral insert, which is
inside the jet nozzle, very similar to a agricultural poison-spray.
If the carburettor you use has a cold-start choke system,
you don't need a Ki-Gas pump, because then you can make
the mixture richer by pulling the choke-handle.
But another advantage of a Ki-Gas system is, that you can
add some two-stroke oil into the petrol of the Ki-Gas
supply-container, and so minimise engine wear in the
dangerous first seconds of running.
The pump itself you can find on autojumbles, the difficult part
to get, are original looking jets.
But here I could help you, because I still have a few right-angle
as well as also T-piece jets, which you can not distinguish
from the jets used at Abingdon in the thirties.
If you know somebody from your area doing the pilgrimage
to Silverstone in 3 weeks time, I would bring a set with me.
Cheers,
Gerhard Maier
-----Original Message-----
From: owner-mg-mmm@autox.team.net [mailto:owner-mg-mmm@autox.team.net]On
Behalf Of keith chetland
Sent: Monday, June 24, 2002 10:25 PM
To: mg-mmm@autox.team.net
Subject: J2 supercharging
Can anyone help me with info on the cold start nozzle for use with a ki-gas
pump?
I'm a trained toolmaker with full workshop facilities but would be better
off junking my first attempt for a water pistol.
Assumedly a misting effect is required, but is additional air also needed?
Or can I stop pratting about and buy something off the shelf?
Incidentally I like this ki-gas thingy, and the thought that it might once
have been used by a spitfire pilot. So don't no bugger tell me that was an
entirely different type and I'm better off without it anyway!
Thanks Keith.
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